Consider the following code snippet
var a1 = [,,,];
var a2 = new Array(3);
0 in a1
0 in a2
The result would be
var a1 = [,,,];
var a2 = new Array(3);
0 in a1
0 in a2
A. true false
B. false true
C. true true
D. None of the above
Answer: Option A
Solution (By Examveda Team)
a1 has an element with index 0 and a2 has no element with index 0.This Question Belongs to Javascript >> Array And Function
Consider the code snippet given below
var count = [1,,3];
A. The omitted value takes “undefined”
B. This results in an error
C. This results in an exception
D. None of the mentioned
A. true false
B. false true
C. true true
D. None of the above
The pop() method of the array does which of the following task ?
A. decrements the total length by 1
B. increments the total length by 1
C. prints the first element but no effect on the length
D. None of the mentioned
Consider the following code snippet :
if (!a[i]) continue ;
A. Skips the undefined elements
B. Skips the non existent elements
C. Skips the null elements
D. All of the mentioned
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